处理长时间的任务的时候常需要进度条显示，有几种实现方式

1，普通的进度条

import

 java.lang.reflect.InvocationTargetException;

import

 org.eclipse.core.runtime.IProgressMonitor;

import

 org.eclipse.jface.dialogs.ProgressMonitorDialog;

import

 org.eclipse.jface.operation.IRunnableWithProgress;

import

 org.eclipse.swt.widgets.Display;

import

 org.eclipse.swt.widgets.Shell;

public

 

class

 TestProgress 

{

    static boolean stopflg = false;

    /** *//**

     * Launch the application

     * @param args

     */

    public static void main(String[] args) throws Exception{

        final Display display = Display.getDefault();

        final Shell shell = new Shell();

        shell.setSize(500, 375);

        shell.setText("SWT Application");

        

        //

        IRunnableWithProgress runnable = new IRunnableWithProgress(){

            public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {

                monitor.beginTask("generate", 30);

                for(int i=0;i<100;i++){

                    if(monitor.isCanceled()){

                        return;

                    }

                    monitor.worked(1);

                    Thread.sleep(50);

                }

                

                monitor.done();

            }

        };

        new ProgressMonitorDialog(shell).run(true, true, runnable);

        shell.open();

        shell.layout();

        while (!shell.isDisposed()) {

            if (!display.readAndDispatch())

                display.sleep();

        }

    }

}

2,反复循环的进度条

import

 java.lang.reflect.InvocationTargetException;

import

 org.eclipse.core.runtime.IProgressMonitor;

import

 org.eclipse.jface.dialogs.ProgressMonitorDialog;

import

 org.eclipse.jface.operation.IRunnableWithProgress;

import

 org.eclipse.swt.widgets.Display;

import

 org.eclipse.swt.widgets.Shell;

public

 

class

 TestProgress 

{

    static boolean stopflg = false;

    /** *//**

     * Launch the application

     * @param args

     */

    public static void main(String[] args) throws Exception{

        final Display display = Display.getDefault();

        final Shell shell = new Shell();

        shell.setSize(500, 375);

        shell.setText("SWT Application");

        

        //

        IRunnableWithProgress runnable = new IRunnableWithProgress(){

            public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {

                monitor.beginTask("generate", 30);

                int i=0;

                while(true){

                    if(stopflg){

                        break;

                    }

                    i++;

                    if(i==30){

                        i=0;

                        monitor.beginTask("generate", 30);

                    }

                    monitor.worked(1);

                    Thread.sleep(100);

                }

                monitor.done();

            }

        };

        new ProgressMonitorDialog(shell).run(true, true, runnable);

        shell.open();

        shell.layout();

        while (!shell.isDisposed()) {

            if (!display.readAndDispatch())

                display.sleep();

        }

    }

}

3,rcp中后台任务的进度条

使用Job建立后台任务，只需要设置job.setUser(true)进度条就出现了，和上边一样，进度条需要自己来控制进度。如果做一个cool的进度条，就看你如何让进度条显示出实际的任务进程。